而前段大脑皮层正是高效思考的关键，它包括设置目标，语言和记忆。
The pre-frontal cortex is important to higher-order thinking, including goal-setting, language and memory.
术中彻底切除病灶，并包括虹膜、晶体和前段玻璃体。
Key precedures of this operation include iridectomy, Ientectomy and anterior vitrectomy.
周末的前段是处理家庭事务的最好时间，这包括从付帐单到热烈的家庭讨论。
The early part of the weekend is a great time to take care of domestic matters, from paying bills to intense family discussions.
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